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What number will come next i...

What number will come next in the series and replace the Question Mark? (10, 20, 74, 100, 202, ?)

Correct answers: 53

The first user who solved this task is Erkain Mahajanian.

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Daddy, what happened to him?

A father was at the beach with his children when the four-year-old son ran up to him, grabbed his hand, and led him to the shore, where a seagull lay dead in the sand.

"Daddy, what happened to him?" the son asked.

"He died and went to Heaven," the dad replied.

The boy thought a moment and then said, "Did God throw him back down?"

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John Elder

Died 17 Sep 1869 at age 45 (born 8 Mar 1824).Scottish marine engineer who, assisted by W.J.M. Rankine, developed the compound steam marine engine (1854) by dividing the steam expansion into two cylinders, so that each cycled through a smaller range of temperatures and pressures which greatly improved fuel efficiency. The S.S. Brandon sailed in Jul 1854 with their first engine of this type, which used a third less coal than was possible before. Elder continued improve his designs to give even more economy. As a result, his engineering business on the Clyde in Glasgow, Scotland, continued to grow, with over 4,000 workers. Between 1853 and 1867, his firm took out fourteen important patents, including a quadruple-expansion engine (1862). He died at the young age of 45 from liver disease. However, his ship yard remains today as Kvaerner Govan Ltd.«

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